/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.api.common.eventtime;

/**
 * A {@link WatermarkStrategy} that overrides the {@link TimestampAssigner} of the given base {@link
 * WatermarkStrategy}.
 */
final class WatermarkStrategyWithTimestampAssigner<T> implements WatermarkStrategy<T> {

	private static final long serialVersionUID = 1L;

	private final WatermarkStrategy<T> baseStrategy;
	private final TimestampAssignerSupplier<T> timestampAssigner;

	WatermarkStrategyWithTimestampAssigner(
			WatermarkStrategy<T> baseStrategy,
			TimestampAssignerSupplier<T> timestampAssigner) {
		this.baseStrategy = baseStrategy;
		this.timestampAssigner = timestampAssigner;
	}

	@Override
	public TimestampAssigner<T> createTimestampAssigner(TimestampAssignerSupplier.Context context) {
		return timestampAssigner.createTimestampAssigner(context);
	}

	@Override
	public WatermarkGenerator<T> createWatermarkGenerator(WatermarkGeneratorSupplier.Context context) {
		return baseStrategy.createWatermarkGenerator(context);
	}
}
